Laravel 5.3 Session store not set on request - php

Question

I have a Laravel project and I'm getting the following error and tried other questions asked before but i can't understand the problem. plz anybody guide me.
RuntimeException in C:\xampp\htdocs\project\vendor\laravel\framework\src\Illuminate\Http\Request.php line 905:
My routes.php file is here:
Route::group(['middleware' => ['web']], function () {
// default public route
Route::get('/', 'DashboardController#index');
// Rediret for Login Page
Route::get('/loginmsg', 'LoginMessageController#index');
// dashboard route
Route::get('dashboard/index', 'DashboardController#index');
});
//Route::get('/service/get/login','App\Http\Controllers\Auth\LoginMessageController#index')->name('xyz');
Route::group(['middleware' => 'web'], function () {
Route::auth();
Route::get('register', 'DashboardController#index');
});
Here's my register.blade.php
#extends('layouts.app')
#section('content')
<div class="container">
<div class="row">
<div class="col-md-8 col-md-offset-2">
<div class="panel panel-default">
<div class="panel-heading">Register</div>
<div class="panel-body">
<form class="form-horizontal" role="form" method="POST" action="{{ url('/register') }}">
{{ csrf_field() }}
<div class="form-group{{ $errors->has('name') ? ' has-error' : '' }}">
<label for="name" class="col-md-4 control-label">Name</label>
<div class="col-md-6">
<input id="name" type="text" class="form-control" name="name" value="{{ old('name') }}">
#if ($errors->has('name'))
<span class="help-block">
<strong>{{ $errors->first('name') }}</strong>
</span>
#endif
</div>
</div>
<div class="form-group{{ $errors->has('email') ? ' has-error' : '' }}">
<label for="email" class="col-md-4 control-label">E-Mail Address</label>
<div class="col-md-6">
<input id="email" type="email" class="form-control" name="email" value="{{ old('email') }}">
#if ($errors->has('email'))
<span class="help-block">
<strong>{{ $errors->first('email') }}</strong>
</span>
#endif
</div>
</div>
<div class="form-group{{ $errors->has('password') ? ' has-error' : '' }}">
<label for="password" class="col-md-4 control-label">Password</label>
<div class="col-md-6">
<input id="password" type="password" class="form-control" name="password">
#if ($errors->has('password'))
<span class="help-block">
<strong>{{ $errors->first('password') }}</strong>
</span>
#endif
</div>
</div>
<div class="form-group{{ $errors->has('password_confirmation') ? ' has-error' : '' }}">
<label for="password-confirm" class="col-md-4 control-label">Confirm Password</label>
<div class="col-md-6">
<input id="password-confirm" type="password" class="form-control" name="password_confirmation">
#if ($errors->has('password_confirmation'))
<span class="help-block">
<strong>{{ $errors->first('password_confirmation') }}</strong>
</span>
#endif
</div>
</div>
<div class="form-group">
<div class="col-md-6 col-md-offset-4">
<button type="submit" class="btn btn-primary">
<i class="fa fa-btn fa-user"></i> Register
</button>
</div>
</div>
</form>
</div>
</div>
</div>
</div>
</div>
#endsection